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drm/amdgpu: add support of debugfs for mqd information

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Add debugfs support for mqd for each queue of the client.

The address exposed to debugfs could be used to dump
the mqd.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250704075548.1549849-5-sunil.khatri@amd.com
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Sunil Khatri 2025-07-04 13:25:48 +05:30 committed by Christian König
parent 719b378d37
commit c03ea34cbf
2 changed files with 53 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

52
drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
View file

@ -318,6 +318,9 @@ amdgpu_userq_destroy(struct drm_file *filp, int queue_id)
amdgpu_bo_unreserve(queue->db_obj.obj); amdgpu_bo_unreserve(queue->db_obj.obj);
} }
amdgpu_bo_unref(&queue->db_obj.obj); amdgpu_bo_unref(&queue->db_obj.obj);
debugfs_remove_recursive(queue->debugfs_queue);
r = amdgpu_userq_unmap_helper(uq_mgr, queue); r = amdgpu_userq_unmap_helper(uq_mgr, queue);
amdgpu_userq_cleanup(uq_mgr, queue, queue_id); amdgpu_userq_cleanup(uq_mgr, queue, queue_id);
mutex_unlock(&uq_mgr->userq_mutex); mutex_unlock(&uq_mgr->userq_mutex);
@ -343,6 +346,46 @@ static int amdgpu_userq_priority_permit(struct drm_file *filp,
return -EACCES; return -EACCES;
} }
#if defined(CONFIG_DEBUG_FS)
static int amdgpu_mqd_info_read(struct seq_file *m, void *unused)
{
struct amdgpu_usermode_queue *queue = m->private;
struct amdgpu_bo *bo;
int r;
if (!queue || !queue->mqd.obj)
return -EINVAL;
bo = amdgpu_bo_ref(queue->mqd.obj);
r = amdgpu_bo_reserve(bo, true);
if (r) {
amdgpu_bo_unref(&bo);
return -EINVAL;
}
seq_printf(m, "queue_type %d\n", queue->queue_type);
seq_printf(m, "mqd_gpu_address: 0x%llx\n", amdgpu_bo_gpu_offset(queue->mqd.obj));
amdgpu_bo_unreserve(bo);
amdgpu_bo_unref(&bo);
return 0;
}
static int amdgpu_mqd_info_open(struct inode *inode, struct file *file)
{
return single_open(file, amdgpu_mqd_info_read, inode->i_private);
}
static const struct file_operations amdgpu_mqd_info_fops = {
.owner = THIS_MODULE,
.open = amdgpu_mqd_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#endif
static int static int
amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args) amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)
{ {
@ -352,6 +395,7 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)
const struct amdgpu_userq_funcs *uq_funcs; const struct amdgpu_userq_funcs *uq_funcs;
struct amdgpu_usermode_queue *queue; struct amdgpu_usermode_queue *queue;
struct amdgpu_db_info db_info; struct amdgpu_db_info db_info;
char *queue_name;
bool skip_map_queue; bool skip_map_queue;
uint64_t index; uint64_t index;
int qid, r = 0; int qid, r = 0;
@ -475,6 +519,14 @@ amdgpu_userq_create(struct drm_file *filp, union drm_amdgpu_userq *args)
} }
} }
queue_name = kasprintf(GFP_KERNEL, "queue-%d", qid);
if (!queue_name)
return -ENOMEM;
/* Queue dentry per client to hold MQD information */
queue->debugfs_queue = debugfs_create_dir(queue_name, filp->debugfs_client);
debugfs_create_file("mqd_info", 0444, queue->debugfs_queue, queue, &amdgpu_mqd_info_fops);
kfree(queue_name);
args->out.queue_id = qid; args->out.queue_id = qid;

1
drivers/gpu/drm/amd/amdgpu/amdgpu_userq.h
View file

@ -65,6 +65,7 @@ struct amdgpu_usermode_queue {
struct dma_fence *last_fence; struct dma_fence *last_fence;
u32 xcp_id; u32 xcp_id;
int priority; int priority;
struct dentry *debugfs_queue;
}; };
struct amdgpu_userq_funcs { struct amdgpu_userq_funcs {